A SPECIALIST integrity unit has been formed inside the Department of Immigration to deal with widespread fraud in the working holiday visa program, on which industries such as fruit growing depend.

More than 200 internet advertisements have been found offering to buy or sell documents allowing backpackers to claim they had worked in rural jobs without them leaving Sydney, and thus extend their working holiday visas. The standard fee is $400. So far, 64 visas have been cancelled over the fraud and at least 19 more are being reviewed.

One man, an Irish national, has been convicted of fraud. ”There’s been more than 100 fraudulent claims identified this financial year,” a spokeswoman for the department said. ”The answer is we don’t know [the full extent of the fraud]. At this stage it’s too early to determine and we will be looking at it over the next six months.”

The working holiday visa (subclass 417) allows people to extend their stay in Australia by a year if they can prove they have worked in a rural area for three months. Applications are lodged online but have been abused by people selling Australian business numbers linked to farms so backpackers can falsely claim they worked on farms.

”Second year visas for sale,” one ad read. ”Will email completed 1263 form and add your details to my books so you can gain second year visa with ease.”

Another ad offering similar services, posted on the Gumtree website on Saturday, had received more than 2000 hits by last night. Unlike visa scams targeting international students, mainly Indians, this fraud is used mainly by European visitors.

One backpacker told the Herald he had been offered the false documentation as soon as be arrived in Australia, by people staying at the same hostel.

”People told me about buying the documents – getting the numbers to put in,” he said. ”When I arrived here people said you can go there [to a farm] or you can buy. Everyone knows about it. It’s easy. All the people who are here know about that.”

The federal Opposition spokeswoman on immigration, Sharman Stone, said the widespread fraud reflected under-resourcing of the department.